Combined cat house capable of being built in levels

A combined cat house capable of being built in levels, comprising:

• a single-level cat house comprising:
• transverse plates each having a lower side face and an upper side face, a plurality of slots are formed in the lower side face and upper side face of each of the transverse plates,
• side plates having a left side plate and a right side plate, and
• a central separator plate;
• the transverse plates having an upper transverse plate and a lower transverse plate;
• wherein the left side plate, the right side plate and the central separator plate are fixed to the upper transverse plate and the lower transverse plate by the plurality of slots in an inserting manner;
• a transverse plate hole for passing through is formed in each of the transverse plates, and a separator plate hole for passing through is formed in the central separator plate;
• and
• wherein a multi-level cat house is formed by continuously inserting the side plates, the central separator plate and the transverse plates, wherein each of an upper side and a lower side of each of the left side plate and the right side plate is provided with a slide latch, the slide latch is slidingly fixed after passing through slide latch holes in a corresponding one of the side plates and a corresponding one of the transverse plates.